yesterday we had a trip to calicut
total 410 km traveled in 8hrs 30 mins. in some places there was heavy traffic and max speed was 100km. we were at 70-80km/hr most of the time(because in the day time roads are much crowded in Kerala).
got 17.4kmpl as per the MID with 100% A/C..

There really are loads of factors to consider if we wish to extract the maximum fuel efficiency from our vehicle.

That said, i've witnessed 24 kmpl at a constant 70-80 (over 150+km's) AND at a constant 110-120 too (over 200+km's). I don't really know what speed is best. How we drive is more important.

Cheers.

Click to expand...

The key here with the MJD is that, it doesn't like the hard accelaration. If you take your car to the speed of 100-120 gradually without any hard acceleration, it will reward with better FE. I have witnessed this multiple times.

It's more about keeping it constant & you will get it in high figures despite of high speeds. I don't mean 160-170 kmph for high speeds here but somewhere in the range 100-120 kmph. Keep it constant with least variations in throttle & it will settle down at 24-27 km/ltr.

yesterday we had a trip to calicut
total 410 km traveled in 8hrs 30 mins. in some places there was heavy traffic and max speed was 100km. we were at 70-80km/hr most of the time(because in the day time roads are much crowded in Kerala).
got 17.4kmpl as per the MID with 100% A/C..

Click to expand...

Return from Calicut was in the night.

.

18.7km/litre... the If I could have keep average speed around 60km/h efficiency might be over 21kmpl...

Last saturday (24-03-2012) I had made a short trip of 450kms to Sri Gnana Saraswati Temple at Basar along with my family for my daughter's Aksharabhyas.
The route taken was NH7 to Dichpally and take a diversion to Basar via Nizamabad.
We planned to leave at 5.00 Am, but asusual had to start late around 6.00 Am.
I told my wife that today I will be driving sedately and will check the max amount of milage I can get.
For 50kms everything was fine, empty and neat roads tried to test my patience. But I kept my cool. But once we approached a toll gate,a Figo and an i20 who seem to be racing, cut my lane and entered the toll gate before me.
There was a slight bit of road rage in me, but again wanted to stick to the sedate driving.
After the toll gate we passed couple of kms and my wife said, its quite boring going at this speed (80kmph). Can't we go a little bit faster?
Instantly all my patience and the will to drive sedately went into the drain.
I hit the pedal and in no time I overtook both the speeding Figo and i20 which disappered in my rear view mirror and were never to be seen again.
The only time some one overtook me were these 2 cars at the toll gate in the whole trip.